CVE-2024-26781 (GCVE-0-2024-26781)
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2025-05-04 08:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix possible deadlock in subflow diag Syzbot and Eric reported a lockdep splat in the subflow diag: WARNING: possible circular locking dependency detected 6.8.0-rc4-syzkaller-00212-g40b9385dd8e6 #0 Not tainted syz-executor.2/24141 is trying to acquire lock: ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline] ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137 but task is already holding lock: ffffc9000135e488 (&h->lhash2[i].lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffffc9000135e488 (&h->lhash2[i].lock){+.+.}-{2:2}, at: inet_diag_dump_icsk+0x39f/0x1f80 net/ipv4/inet_diag.c:1038 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&h->lhash2[i].lock){+.+.}-{2:2}: lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __inet_hash+0x335/0xbe0 net/ipv4/inet_hashtables.c:743 inet_csk_listen_start+0x23a/0x320 net/ipv4/inet_connection_sock.c:1261 __inet_listen_sk+0x2a2/0x770 net/ipv4/af_inet.c:217 inet_listen+0xa3/0x110 net/ipv4/af_inet.c:239 rds_tcp_listen_init+0x3fd/0x5a0 net/rds/tcp_listen.c:316 rds_tcp_init_net+0x141/0x320 net/rds/tcp.c:577 ops_init+0x352/0x610 net/core/net_namespace.c:136 __register_pernet_operations net/core/net_namespace.c:1214 [inline] register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1283 register_pernet_device+0x33/0x80 net/core/net_namespace.c:1370 rds_tcp_init+0x62/0xd0 net/rds/tcp.c:735 do_one_initcall+0x238/0x830 init/main.c:1236 do_initcall_level+0x157/0x210 init/main.c:1298 do_initcalls+0x3f/0x80 init/main.c:1314 kernel_init_freeable+0x42f/0x5d0 init/main.c:1551 kernel_init+0x1d/0x2a0 init/main.c:1441 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 -> #0 (k-sk_lock-AF_INET6){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18ca/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 lock_sock_fast include/net/sock.h:1723 [inline] subflow_get_info+0x166/0xd20 net/mptcp/diag.c:28 tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline] tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137 inet_sk_diag_fill+0x10ed/0x1e00 net/ipv4/inet_diag.c:345 inet_diag_dump_icsk+0x55b/0x1f80 net/ipv4/inet_diag.c:1061 __inet_diag_dump+0x211/0x3a0 net/ipv4/inet_diag.c:1263 inet_diag_dump_compat+0x1c1/0x2d0 net/ipv4/inet_diag.c:1371 netlink_dump+0x59b/0xc80 net/netlink/af_netlink.c:2264 __netlink_dump_start+0x5df/0x790 net/netlink/af_netlink.c:2370 netlink_dump_start include/linux/netlink.h:338 [inline] inet_diag_rcv_msg_compat+0x209/0x4c0 net/ipv4/inet_diag.c:1405 sock_diag_rcv_msg+0xe7/0x410 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 As noted by Eric we can break the lock dependency chain avoid dumping ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/70e5b013538d5e4cb421afed431a5fcd2a5d49ee Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/cc32ba2fdf3f8b136619fff551f166ba51ec856d Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/d487e7ba1bc7444d5f062c4930ef8436c47c7e63 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/d6a9608af9a75d13243d217f6ce1e30e57d56ffe Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f27d319df055629480b84b9288a502337b6f2a2e Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/fa8c776f4c323a9fbc8ddf25edcb962083391430 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/70e5b013538d5e4cb421afed431a5fcd2a5d49ee Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/cc32ba2fdf3f8b136619fff551f166ba51ec856d Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/d487e7ba1bc7444d5f062c4930ef8436c47c7e63 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/d6a9608af9a75d13243d217f6ce1e30e57d56ffe Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f27d319df055629480b84b9288a502337b6f2a2e Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/fa8c776f4c323a9fbc8ddf25edcb962083391430 Patch
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Mailing List
Impacted products
Vendor Product Version
Linux Linux Version: 8affdbb3e2ef6b6a3a467b87dc336dc601dc2ed9
Version: 7d6e8d7ee13b876e762b11f4ec210876ab7aec84
Version: 71787c665d09a970b9280c285181d3a2d1bf3bb0
Version: e074c8297ee421e7ff352404262fe0e042954ab7
Version: 298ac00da8e6bc2dcd690b45108acbd944c347d3
Version: b8adb69a7d29c2d33eb327bca66476fb6066516b
 Create a notification for this product.
   Linux Linux Version: 5.10.211   ≤
Version: 5.15.150   ≤
Version: 6.1.80   ≤
Version: 6.6.19   ≤
Version: 6.7.7   ≤
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix possible deadlock in subflow diag\n\nSyzbot and Eric reported a lockdep splat in the subflow diag:\n\n   WARNING: possible circular locking dependency detected\n   6.8.0-rc4-syzkaller-00212-g40b9385dd8e6 #0 Not tainted\n\n   syz-executor.2/24141 is trying to acquire lock:\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\n\n   but task is already holding lock:\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at: spin_lock\n   include/linux/spinlock.h:351 [inline]\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at:\n   inet_diag_dump_icsk+0x39f/0x1f80 net/ipv4/inet_diag.c:1038\n\n   which lock already depends on the new lock.\n\n   the existing dependency chain (in reverse order) is:\n\n   -\u003e #1 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}:\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\n   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]\n   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154\n   spin_lock include/linux/spinlock.h:351 [inline]\n   __inet_hash+0x335/0xbe0 net/ipv4/inet_hashtables.c:743\n   inet_csk_listen_start+0x23a/0x320 net/ipv4/inet_connection_sock.c:1261\n   __inet_listen_sk+0x2a2/0x770 net/ipv4/af_inet.c:217\n   inet_listen+0xa3/0x110 net/ipv4/af_inet.c:239\n   rds_tcp_listen_init+0x3fd/0x5a0 net/rds/tcp_listen.c:316\n   rds_tcp_init_net+0x141/0x320 net/rds/tcp.c:577\n   ops_init+0x352/0x610 net/core/net_namespace.c:136\n   __register_pernet_operations net/core/net_namespace.c:1214 [inline]\n   register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1283\n   register_pernet_device+0x33/0x80 net/core/net_namespace.c:1370\n   rds_tcp_init+0x62/0xd0 net/rds/tcp.c:735\n   do_one_initcall+0x238/0x830 init/main.c:1236\n   do_initcall_level+0x157/0x210 init/main.c:1298\n   do_initcalls+0x3f/0x80 init/main.c:1314\n   kernel_init_freeable+0x42f/0x5d0 init/main.c:1551\n   kernel_init+0x1d/0x2a0 init/main.c:1441\n   ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n   ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\n\n   -\u003e #0 (k-sk_lock-AF_INET6){+.+.}-{0:0}:\n   check_prev_add kernel/locking/lockdep.c:3134 [inline]\n   check_prevs_add kernel/locking/lockdep.c:3253 [inline]\n   validate_chain+0x18ca/0x58e0 kernel/locking/lockdep.c:3869\n   __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\n   lock_sock_fast include/net/sock.h:1723 [inline]\n   subflow_get_info+0x166/0xd20 net/mptcp/diag.c:28\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\n   inet_sk_diag_fill+0x10ed/0x1e00 net/ipv4/inet_diag.c:345\n   inet_diag_dump_icsk+0x55b/0x1f80 net/ipv4/inet_diag.c:1061\n   __inet_diag_dump+0x211/0x3a0 net/ipv4/inet_diag.c:1263\n   inet_diag_dump_compat+0x1c1/0x2d0 net/ipv4/inet_diag.c:1371\n   netlink_dump+0x59b/0xc80 net/netlink/af_netlink.c:2264\n   __netlink_dump_start+0x5df/0x790 net/netlink/af_netlink.c:2370\n   netlink_dump_start include/linux/netlink.h:338 [inline]\n   inet_diag_rcv_msg_compat+0x209/0x4c0 net/ipv4/inet_diag.c:1405\n   sock_diag_rcv_msg+0xe7/0x410\n   netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543\n   sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280\n   netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n   netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367\n   netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908\n   sock_sendmsg_nosec net/socket.c:730 [inline]\n   __sock_sendmsg+0x221/0x270 net/socket.c:745\n   ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\n   ___sys_sendmsg net/socket.c:2638 [inline]\n   __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\n   do_syscall_64+0xf9/0x240\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\n\nAs noted by Eric we can break the lock dependency chain avoid\ndumping \n---truncated---"
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    "cveId": "CVE-2024-26781",
    "datePublished": "2024-04-04T08:20:15.775Z",
    "dateReserved": "2024-02-19T14:20:24.177Z",
    "dateUpdated": "2025-05-04T08:56:22.085Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26781\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:07.957\",\"lastModified\":\"2025-01-07T17:11:31.483\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: fix possible deadlock in subflow diag\\n\\nSyzbot and Eric reported a lockdep splat in the subflow diag:\\n\\n   WARNING: possible circular locking dependency detected\\n   6.8.0-rc4-syzkaller-00212-g40b9385dd8e6 #0 Not tainted\\n\\n   syz-executor.2/24141 is trying to acquire lock:\\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\\n\\n   but task is already holding lock:\\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at: spin_lock\\n   include/linux/spinlock.h:351 [inline]\\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at:\\n   inet_diag_dump_icsk+0x39f/0x1f80 net/ipv4/inet_diag.c:1038\\n\\n   which lock already depends on the new lock.\\n\\n   the existing dependency chain (in reverse order) is:\\n\\n   -\u003e #1 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}:\\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\\n   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]\\n   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154\\n   spin_lock include/linux/spinlock.h:351 [inline]\\n   __inet_hash+0x335/0xbe0 net/ipv4/inet_hashtables.c:743\\n   inet_csk_listen_start+0x23a/0x320 net/ipv4/inet_connection_sock.c:1261\\n   __inet_listen_sk+0x2a2/0x770 net/ipv4/af_inet.c:217\\n   inet_listen+0xa3/0x110 net/ipv4/af_inet.c:239\\n   rds_tcp_listen_init+0x3fd/0x5a0 net/rds/tcp_listen.c:316\\n   rds_tcp_init_net+0x141/0x320 net/rds/tcp.c:577\\n   ops_init+0x352/0x610 net/core/net_namespace.c:136\\n   __register_pernet_operations net/core/net_namespace.c:1214 [inline]\\n   register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1283\\n   register_pernet_device+0x33/0x80 net/core/net_namespace.c:1370\\n   rds_tcp_init+0x62/0xd0 net/rds/tcp.c:735\\n   do_one_initcall+0x238/0x830 init/main.c:1236\\n   do_initcall_level+0x157/0x210 init/main.c:1298\\n   do_initcalls+0x3f/0x80 init/main.c:1314\\n   kernel_init_freeable+0x42f/0x5d0 init/main.c:1551\\n   kernel_init+0x1d/0x2a0 init/main.c:1441\\n   ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\\n   ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\\n\\n   -\u003e #0 (k-sk_lock-AF_INET6){+.+.}-{0:0}:\\n   check_prev_add kernel/locking/lockdep.c:3134 [inline]\\n   check_prevs_add kernel/locking/lockdep.c:3253 [inline]\\n   validate_chain+0x18ca/0x58e0 kernel/locking/lockdep.c:3869\\n   __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137\\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\\n   lock_sock_fast include/net/sock.h:1723 [inline]\\n   subflow_get_info+0x166/0xd20 net/mptcp/diag.c:28\\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\\n   inet_sk_diag_fill+0x10ed/0x1e00 net/ipv4/inet_diag.c:345\\n   inet_diag_dump_icsk+0x55b/0x1f80 net/ipv4/inet_diag.c:1061\\n   __inet_diag_dump+0x211/0x3a0 net/ipv4/inet_diag.c:1263\\n   inet_diag_dump_compat+0x1c1/0x2d0 net/ipv4/inet_diag.c:1371\\n   netlink_dump+0x59b/0xc80 net/netlink/af_netlink.c:2264\\n   __netlink_dump_start+0x5df/0x790 net/netlink/af_netlink.c:2370\\n   netlink_dump_start include/linux/netlink.h:338 [inline]\\n   inet_diag_rcv_msg_compat+0x209/0x4c0 net/ipv4/inet_diag.c:1405\\n   sock_diag_rcv_msg+0xe7/0x410\\n   netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543\\n   sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280\\n   netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\\n   netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367\\n   netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908\\n   sock_sendmsg_nosec net/socket.c:730 [inline]\\n   __sock_sendmsg+0x221/0x270 net/socket.c:745\\n   ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\\n   ___sys_sendmsg net/socket.c:2638 [inline]\\n   __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\\n   do_syscall_64+0xf9/0x240\\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\\n\\nAs noted by Eric we can break the lock dependency chain avoid\\ndumping \\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mptcp: corrige un posible punto muerto en el diagn\u00f3stico de subflujo Syzbot y Eric informaron sobre un bloqueo de bloqueo en el diagn\u00f3stico de subflujo: ADVERTENCIA: se detect\u00f3 posible dependencia de bloqueo circular 6.8.0-rc4-syzkaller-00212-g40b9385dd8e6 #0 Not tainted syz-executor.2/24141 is trying to acquire lock: ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline] ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137 but task is already holding lock: ffffc9000135e488 (\u0026amp;h-\u0026gt;lhash2[i].lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffffc9000135e488 (\u0026amp;h-\u0026gt;lhash2[i].lock){+.+.}-{2:2}, at: inet_diag_dump_icsk+0x39f/0x1f80 net/ipv4/inet_diag.c:1038 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -\u0026gt; #1 (\u0026amp;h-\u0026gt;lhash2[i].lock){+.+.}-{2:2}: lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __inet_hash+0x335/0xbe0 net/ipv4/inet_hashtables.c:743 inet_csk_listen_start+0x23a/0x320 net/ipv4/inet_connection_sock.c:1261 __inet_listen_sk+0x2a2/0x770 net/ipv4/af_inet.c:217 inet_listen+0xa3/0x110 net/ipv4/af_inet.c:239 rds_tcp_listen_init+0x3fd/0x5a0 net/rds/tcp_listen.c:316 rds_tcp_init_net+0x141/0x320 net/rds/tcp.c:577 ops_init+0x352/0x610 net/core/net_namespace.c:136 __register_pernet_operations net/core/net_namespace.c:1214 [inline] register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1283 register_pernet_device+0x33/0x80 net/core/net_namespace.c:1370 rds_tcp_init+0x62/0xd0 net/rds/tcp.c:735 do_one_initcall+0x238/0x830 init/main.c:1236 do_initcall_level+0x157/0x210 init/main.c:1298 do_initcalls+0x3f/0x80 init/main.c:1314 kernel_init_freeable+0x42f/0x5d0 init/main.c:1551 kernel_init+0x1d/0x2a0 init/main.c:1441 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 -\u0026gt; #0 (k-sk_lock-AF_INET6){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18ca/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 lock_sock_fast include/net/sock.h:1723 [inline] subflow_get_info+0x166/0xd20 net/mptcp/diag.c:28 tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline] tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137 inet_sk_diag_fill+0x10ed/0x1e00 net/ipv4/inet_diag.c:345 inet_diag_dump_icsk+0x55b/0x1f80 net/ipv4/inet_diag.c:1061 __inet_diag_dump+0x211/0x3a0 net/ipv4/inet_diag.c:1263 inet_diag_dump_compat+0x1c1/0x2d0 net/ipv4/inet_diag.c:1371 netlink_dump+0x59b/0xc80 net/netlink/af_netlink.c:2264 __netlink_dump_start+0x5df/0x790 net/netlink/af_netlink.c:2370 netlink_dump_start include/linux/netlink.h:338 [inline] inet_diag_rcv_msg_compat+0x209/0x4c0 net/ipv4/inet_diag.c:1405 sock_diag_rcv_msg+0xe7/0x410 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Como se\u00f1al\u00f3 Eric, podemos romper la cadena de dependencia de bloqueo evitar el vertido ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.19\",\"versionEndExcluding\":\"6.6.21\",\"matchCriteriaId\":\"AEA459B1-9D99-43F5-BF07-DED98EB9F1A2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7.7\",\"versionEndExcluding\":\"6.7.9\",\"matchCriteriaId\":\"C869F4DC-D004-4EAC-8C1D-BADE7D47918B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.10.211:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4984E31-DB63-4A46-BA66-9DE0977CDECB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15.150:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F2FB65FA-EA68-4974-8F77-9817CBD9E418\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1.80:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8513383E-EE09-4F12-8335-61B28C03F2E5\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/70e5b013538d5e4cb421afed431a5fcd2a5d49ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cc32ba2fdf3f8b136619fff551f166ba51ec856d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d487e7ba1bc7444d5f062c4930ef8436c47c7e63\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d6a9608af9a75d13243d217f6ce1e30e57d56ffe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f27d319df055629480b84b9288a502337b6f2a2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fa8c776f4c323a9fbc8ddf25edcb962083391430\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/70e5b013538d5e4cb421afed431a5fcd2a5d49ee\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cc32ba2fdf3f8b136619fff551f166ba51ec856d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d487e7ba1bc7444d5f062c4930ef8436c47c7e63\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d6a9608af9a75d13243d217f6ce1e30e57d56ffe\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f27d319df055629480b84b9288a502337b6f2a2e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fa8c776f4c323a9fbc8ddf25edcb962083391430\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing 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\"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:14:13.451Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26781\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-04T15:25:28.472646Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:22.000Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"mptcp: fix possible deadlock in subflow diag\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8affdbb3e2ef6b6a3a467b87dc336dc601dc2ed9\", \"lessThan\": \"70e5b013538d5e4cb421afed431a5fcd2a5d49ee\", \"versionType\": \"git\"}, {\"status\": 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\"https://git.kernel.org/stable/c/f27d319df055629480b84b9288a502337b6f2a2e\"}, {\"url\": \"https://git.kernel.org/stable/c/fa8c776f4c323a9fbc8ddf25edcb962083391430\"}, {\"url\": \"https://git.kernel.org/stable/c/d487e7ba1bc7444d5f062c4930ef8436c47c7e63\"}, {\"url\": \"https://git.kernel.org/stable/c/d6a9608af9a75d13243d217f6ce1e30e57d56ffe\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: fix possible deadlock in subflow diag\\n\\nSyzbot and Eric reported a lockdep splat in the subflow diag:\\n\\n   WARNING: possible circular locking dependency detected\\n   6.8.0-rc4-syzkaller-00212-g40b9385dd8e6 #0 Not tainted\\n\\n   syz-executor.2/24141 is trying to acquire lock:\\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\\n   ffff888045870130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at:\\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\\n\\n   but task is already holding lock:\\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at: spin_lock\\n   include/linux/spinlock.h:351 [inline]\\n   ffffc9000135e488 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}, at:\\n   inet_diag_dump_icsk+0x39f/0x1f80 net/ipv4/inet_diag.c:1038\\n\\n   which lock already depends on the new lock.\\n\\n   the existing dependency chain (in reverse order) is:\\n\\n   -\u003e #1 (\u0026h-\u003elhash2[i].lock){+.+.}-{2:2}:\\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\\n   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]\\n   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154\\n   spin_lock include/linux/spinlock.h:351 [inline]\\n   __inet_hash+0x335/0xbe0 net/ipv4/inet_hashtables.c:743\\n   inet_csk_listen_start+0x23a/0x320 net/ipv4/inet_connection_sock.c:1261\\n   __inet_listen_sk+0x2a2/0x770 net/ipv4/af_inet.c:217\\n   inet_listen+0xa3/0x110 net/ipv4/af_inet.c:239\\n   rds_tcp_listen_init+0x3fd/0x5a0 net/rds/tcp_listen.c:316\\n   rds_tcp_init_net+0x141/0x320 net/rds/tcp.c:577\\n   ops_init+0x352/0x610 net/core/net_namespace.c:136\\n   __register_pernet_operations net/core/net_namespace.c:1214 [inline]\\n   register_pernet_operations+0x2cb/0x660 net/core/net_namespace.c:1283\\n   register_pernet_device+0x33/0x80 net/core/net_namespace.c:1370\\n   rds_tcp_init+0x62/0xd0 net/rds/tcp.c:735\\n   do_one_initcall+0x238/0x830 init/main.c:1236\\n   do_initcall_level+0x157/0x210 init/main.c:1298\\n   do_initcalls+0x3f/0x80 init/main.c:1314\\n   kernel_init_freeable+0x42f/0x5d0 init/main.c:1551\\n   kernel_init+0x1d/0x2a0 init/main.c:1441\\n   ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\\n   ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\\n\\n   -\u003e #0 (k-sk_lock-AF_INET6){+.+.}-{0:0}:\\n   check_prev_add kernel/locking/lockdep.c:3134 [inline]\\n   check_prevs_add kernel/locking/lockdep.c:3253 [inline]\\n   validate_chain+0x18ca/0x58e0 kernel/locking/lockdep.c:3869\\n   __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137\\n   lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\\n   lock_sock_fast include/net/sock.h:1723 [inline]\\n   subflow_get_info+0x166/0xd20 net/mptcp/diag.c:28\\n   tcp_diag_put_ulp net/ipv4/tcp_diag.c:100 [inline]\\n   tcp_diag_get_aux+0x738/0x830 net/ipv4/tcp_diag.c:137\\n   inet_sk_diag_fill+0x10ed/0x1e00 net/ipv4/inet_diag.c:345\\n   inet_diag_dump_icsk+0x55b/0x1f80 net/ipv4/inet_diag.c:1061\\n   __inet_diag_dump+0x211/0x3a0 net/ipv4/inet_diag.c:1263\\n   inet_diag_dump_compat+0x1c1/0x2d0 net/ipv4/inet_diag.c:1371\\n   netlink_dump+0x59b/0xc80 net/netlink/af_netlink.c:2264\\n   __netlink_dump_start+0x5df/0x790 net/netlink/af_netlink.c:2370\\n   netlink_dump_start include/linux/netlink.h:338 [inline]\\n   inet_diag_rcv_msg_compat+0x209/0x4c0 net/ipv4/inet_diag.c:1405\\n   sock_diag_rcv_msg+0xe7/0x410\\n   netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543\\n   sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280\\n   netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\\n   netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367\\n   netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908\\n   sock_sendmsg_nosec net/socket.c:730 [inline]\\n   __sock_sendmsg+0x221/0x270 net/socket.c:745\\n   ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\\n   ___sys_sendmsg net/socket.c:2638 [inline]\\n   __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\\n   do_syscall_64+0xf9/0x240\\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\\n\\nAs noted by Eric we can break the lock dependency chain avoid\\ndumping \\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.212\", \"versionStartIncluding\": \"5.10.211\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.151\", \"versionStartIncluding\": \"5.15.150\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.81\", \"versionStartIncluding\": \"6.1.80\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.21\", \"versionStartIncluding\": \"6.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.9\", \"versionStartIncluding\": \"6.7.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:56:22.085Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26781\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:56:22.085Z\", \"dateReserved\": \"2024-02-19T14:20:24.177Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-04T08:20:15.775Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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